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Xfce API Documentation
Core Xfce Libraries
Library references can be found in the releases:
Exo
Garcon
libxfce4ui
libxfce4util
thunar
xfce4-panel
xfconf
These libraries are often also installed by distributions in /usr/share/gtk-doc/html/
.
GTK+/Glib Libraries
Additionally, Xfce uses the GTK+/Glib family of libraries which can be found at the following:
Developer Tutorials
Tutorials for getting started with GTK+ are available at:
If you're looking to write a panel plugin, the xfce4-sample-plugin provides a base to get started.